Island



(No Model.)

B. G. GIBSON;

GAR TRUCK.

Patented Apr. 3, 1894.

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Ni'rn "STATES PATENT Erica.

EVERETT G. GIBSON, OF PROVIDENCE, RHODE ISLAND, ASSIGNOR OF ONE- HALFTOEDGAR G. DURFEE, SAME PLACE.

- CAR-TRUCK.

SPECIFICATION forming part of Letters Patent No. 517,688, dated April 3,189d.

Application filed November 20, 1893. Serial No. 491,446. (No model.) i

To all whom it may concern.-

. Be it known that I, EVERETT G. GIBSON, of Providence,in the county ofProvidence and State of Rhode Island, have invented certain new anduseful Improvements in Oar-Trucks; and I hereby declare that thefollowing is a full, clear, and exact description of the same, referencebeing had to the accompanying drawings, forming part of thisspecification.

This invention has reference to improvements in car-trucks in whichsprings are used to support the car-body.

One oject of the invention is to reduce the wear on the spring.

Another object is to so construct the bearings, which are supported bythe spring, that while the ends of the spring are free to move I thereonthe grating of sliding parts is avoided and the wear on the bearingsreduced.

The invention consists in the combination furnished with bearing-boltssurrounded with sleeves adapted to be received in the concavities of thespring and to rotate on. the bolts as the spring bends.

The invention also consists in such other peculiar features ofconstruction and combination of parts as may hereinafter be more fullydescribed and pointed out in the claims.

Figure 1 represents a side view of portions ofa car-body and its truckshowing the improved spring and bearing, parts of the same being brokenaway. Fig. 2 represents a vertical sectional View of the same takenthrough the bearing-sleeve and one end of the spring.

Similar numbers of' reference designate corresponding parts throughout.

Bearings for the ends of springs in cartrucks have heretofore beenformed by bolts movable in longitudinal-slots in brackets depending fromthe car-body, the ends of the springs being secured to the bolts themovementof which, in the slots, allowed sufficient play for theoperation of the spring,-the constant movement of the bolts in the slotspro- In carrying my invention into practice my aim has been to dispensewith sliding bearings for the ends of the spring to increase the surfaceof contact between the spring and the bearing and at the same time toallow the ends of the spring free play for the action of the spring.

In the drawings 5 indicates the upper sideframe of a car-truck, and 6 isa spring secured to the upper surface of the side-frame by the box 7.The spring is formed from a series'of leaves of graduated lengths, thetwo upper leaves 6'-6 being longer than the lower leaves and havingtransverse concavities in their upper surfaces formed by bending thenear the ends of the bearing-plate, and se-- cured throughperforations'in each pair of bracket-plates is a transverse-bolt 11carrying a rotatable sleeve 12 adapted to be received in the concaveportion .at the end of the leaves 6' of the spring.

The diameter of the sleeve 12 being considerably greater than that ofthe bolt, or pin, in the old method presents a much better bearing tothe end of the spring, considerably reducing the wear on the same, whilethe rotation of the sleeve on the bolt allows free play to the action ofthe'spring.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- 1. In a car-truck, the combination with theside-frame, and a curved spring secured thereto and having transverseconcavities in its upper end-portions, of a bearing-plate havingdepending bracket-plates, a shaft fixed in said bracket-plates, sleevesrotatably mounted onsaid shaft between said bracket-plates and thesleeves l2-12 loosely mounted on 10 said bolts, as and for the purposedescribed.

In witness whereof I have hereunto set my hand.

EVERETT G. GIBSON.

Witnesses:

JOSEPH A. MILLER, J r., a M. F. BLIGH.

